The long-term conservation of historic buildings is entirely dependent on their being used and their ability to meet today’s standards of comfort and energy efficiency. Refurbishments designed to make buildings more energy efficient must take historic conservation concerns into account. In cooperation with working groups dealing with preservation of heritage buildings and rehabilitation of existing structures specific solutions adapted to individual old buildings are explored.
Wherever possible, the restoration of old buildings should be accompanied by energy-efficiency improvements to the building envelope. When external insulation is not viable, fitting internal insulation is usually the only alternative. However, this poses special structural challenges with respect to moisture balance. Cramped space where insulation components are joined and elevated humidity levels in rooms demand particular care when planning and implementing insulation measures. Using hygrothermal simulations and lab-based and on-site research, internal insulation solutions are analyzed and optimized based on actual building occupancy and operation.